notmuch: fix build with clang and on 10.9

Fixes Homebrew/homebrew#23555.

Formula/notmuch.rb

@@ -27,8 +27,12 @@ class Notmuch < Formula
   depends_on 'talloc'
   depends_on 'gmime'
 
-  fails_with :clang do
-    cause "./lib/notmuch-private.h:478:8: error: visibility does not match previous declaration"
+  def patches
+    p = []
+    # Fix for mkdir behavior change in 10.9: http://notmuchmail.org/pipermail/notmuch/2013/016388.html
+    p << DATA
+    # Fix for building with clang: http://git.notmuchmail.org/git/notmuch/commit/db465e443f3cd5ef3ba52304ab8b5dc6e0d7e620
+    p << "http://git.notmuchmail.org/git/notmuch/patch/db465e443f3cd5ef3ba52304ab8b5dc6e0d7e620"
   end
 
   def install
@@ -40,10 +44,28 @@ class Notmuch < Formula
     end
     system "./configure", *args
 
-    if ARGV.verbose?
-      system "make install V=1"
-    else
-      system "make install"
-    end
+    system "make", "V=1", "install"
   end
 end
+
+__END__
+diff --git a/Makefile.local b/Makefile.local
+index 72524eb..c85e09c 100644
+--- a/Makefile.local
++++ b/Makefile.local
+@@ -236,11 +236,11 @@ endif
+ quiet ?= $($(shell echo $1 | sed -e s'/ .*//'))
+ 
+ %.o: %.cc $(global_deps)
+-	@mkdir -p .deps/$(@D)
++	@mkdir -p $(patsubst %/.,%,.deps/$(@D))
+ 	$(call quiet,CXX $(CPPFLAGS) $(CXXFLAGS)) -c $(FINAL_CXXFLAGS) $< -o $@ -MD -MP -MF .deps/$*.d
+ 
+ %.o: %.c $(global_deps)
+-	@mkdir -p .deps/$(@D)
++	@mkdir -p $(patsubst %/.,%,.deps/$(@D))
+ 	$(call quiet,CC $(CPPFLAGS) $(CFLAGS)) -c $(FINAL_CFLAGS) $< -o $@ -MD -MP -MF .deps/$*.d
+ 
+ .PHONY : clean
+-- 
+1.8.4.2